public class Demo1 {
    private static int count=0;

    public static void main(String[] args) throws InterruptedException {
//把count变成局部变量，会直接报错
        //int count=0;
        Thread t1=new Thread(()->{
for(int i=0;i<50000;i++){
count++;

}
    });
    
    Thread t2=new Thread(()->{
for(int i=0;i<50000;i++){
count++;

}
    });

t1.start();
t2.start();


t1.join();
t2.join();
System.out.println(count);
    }

}

